As per case facts, petitioners, who are qualified medical practitioners, applied for Medical Officer and Specialist Doctor posts advertised by MPPSC. The essential eligibility conditions included a Post Graduate qualification ... and Permanent Registration with the Madhya Pradesh Medical Council. Crucially, the advertisements did not explicitly require a "Post Graduate Additional Registration Certificate" by the cut-off date. Despite petitioners meeting the stated criteria and participating in the selection process, including interviews, their candidatures were subsequently rejected. The sole reason cited for rejection was that their "Post Graduate Additional Registration" was obtained after the specified cut-off date of 21/04/2025, a condition not initially advertised. Petitioners argued that this was an arbitrary and illegal introduction of a new requirement retrospectively, violating principles of fairness and constitutional rights, and that delays in additional registration were administrative and beyond their control.The question arose whether the rejection of petitioners' candidature based on obtaining "Post Graduate Additional Registration" after the cut-off date was legally sustainable, given that this specific requirement was not expressly stipulated as an essential eligibility condition in the original recruitment advertisements.Finally, the Court ruled that the essential educational qualification was the Post Graduate Diploma/Degree/Super Specialty qualification recognized by the Medical Council of India, while Permanent Registration was listed as a "Desirable Qualification," not essential. The Court emphasized that any ambiguity in recruitment advertisements must benefit the candidate, and introducing a new, unstated eligibility condition at a belated stage, especially after candidates have proceeded in the selection process, is arbitrary and impermissible, equating to changing the rules after the game has begun. Consequently, the Court allowed the writ petitions, directing the competent authority to verify if petitioners possessed the essential educational qualification by the cut-off date, irrespective of their "Additional Registration" status, and to permit them to continue the recruitment process if found eligible based on the explicitly advertised criteria.